Recent fossil finds could mean that "Lucy" wasn't our direct ancestor, some scientists say. Others strongly disagree.

FILE - The framed hominid fossil "Lucy" is seen at a exhibition at the Ethiopian Natural History Museum in the Ethiopian capital of Addis Ababa, Tuesday, Oct. 24, 2006. (AP Photo/Les Neuhaus, file) ...

A foot fossil found in Ethiopia belonged to an ancient human. The finding could knock one of the most famous names in human evolution from her spot on the family tree.

The 3.18-million-year-old bone fragments of human ancestor Lucy, which rarely leave Ethiopia, went on display in Prague on Monday, with the Czech prime minister hailing the fossils' "first ever" ...